Intake Manifolld Gasket

Hey guys, im about to put my new motor together, and im switching over the water pump, intake manfiold, and things like that. What intake manifold gasket should I use for the gt40x heads and the cobra lower intake? I was thinking about just using the stock gasket set for the cobra manifold, but would the cutouts be big enough for the heads, or does it not matter, considering they are the same size (i think) as the intake manifold ports?
Also, the same thing goes for the exhuast manifold gasket. I was using the MS90000's (stock port size gaskets) from felpro, will they still work, or should I switch to a bigger sized gasket?

Also,
Im buying a new water pump:
http://store.summitracing.com/default.asp?target=partdetail.asp&part=FMS-M-8501-D50&FROM=MG
Do i just need a gasket for the timing cover to block gasket? or do I need more? thanks!

Anyone? im assuming anyone who uses aluminum heads with a cobra intake should be able to answer the question, as the port sizes are bigger then stock.

Thanks!